Three-cylinder gasoline engine with improved sound and lower emissions. The i8’s combustion engine has also undergone further optimization to ready it for the new Coupe and Roadster. The turbocharged three-cylinder unit featuring direct injection and VALVETRONIC variable valve timing extracts a maximum output of 228 hp from its displacement of just 1.5 liters, plus peak torque of 236 lb-ft. It is pleasantly refined and generates a distinctive soundtrack that now has an even sportier note when its power reserves are called upon.
The system output produced by the electric motor and gasoline engine acting in unison has increased to 369 hp in the new BMW i8 Coupe and first-ever BMW i8 Roadster. The new BMW i8 Coupe accelerates from 0 to 60 mph in 4.2 seconds (preliminary), while the first ever BMW i8 Roadster accelerates in 4.4 seconds (preliminary). Both models have an electronically limited top speed of 155 mph.
Combined fuel economy in everyday driving, both models return fuel economy and emissions figures that undercut those for conventionally powered sports cars with similar outputs by around 50 per cent, yielding approximately 70 MPGe (preliminary figures).
Maximized driving pleasure with intelligent energy management and hybrid-specific all-wheel drive. In hybrid mode, the electric motor provides a power boost to assist the engine when vigorous acceleration is required. The electric motor is also able to recuperate energy and feed it to the high-voltage battery on the overrun and under braking. The gasoline engine’s high-voltage starter-generator can similarly generate additional reserves of electricity, thereby ensuring that sufficient energy is on tap at all times for the electric drive system in the new BMW i8 Coupe and first-ever BMW i8 Roadster.
This blend of dynamism and efficiency is further honed by the intelligent energy management’s proactive function. When the navigation system’s route guidance function is activated, the energy management ensures the electric motor is employed as extensively and as wisely as possible from an efficiency point of view. The system analyses the route in full and prompts the powertrain management to run on purely electric power, particularly over low-speed sections of the journey.
BMW i8 Roadster with model-specific chassis and body features. The high-end chassis technology in the new BMW i8 Coupe and first-ever BMW i8 Roadster is based on a double-wishbone front axle and a five-link rear axle, whose aluminum components have been engineered for optimum weight and rigidity using specific design techniques and production processes. Also standard on both models is Dynamic Damper Control. The bespoke tuning of the suspension and damping systems, the specially configured steering characteristics, a firmer roll stabilization set-up and precise tweaks of the DSC parameters together ensure the first-ever BMW i8 Roadster boasts all of the plug-in hybrid sports car’s hallmark handling and performance qualities.